/**
 * Copyright (c) 2011-2019, James Zhan 詹波 (jfinal@126.com).
 * <p>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package sf.database.template.enjoy.ext;

import com.jfinal.kit.StrKit;
import com.jfinal.template.Directive;
import com.jfinal.template.Env;
import com.jfinal.template.Template;
import com.jfinal.template.expr.ast.Const;
import com.jfinal.template.expr.ast.Expr;
import com.jfinal.template.expr.ast.ExprList;
import com.jfinal.template.io.Writer;
import com.jfinal.template.stat.ParseException;
import com.jfinal.template.stat.Scope;

import java.util.Map;

/**
 * SqlDirective
 */
public class SqlDirective extends Directive {

    private String id;

    public void setExprList(ExprList exprList) {
        if (exprList.length() == 0) {
            throw new ParseException("The parameter of #sql directive can not be blank", location);
        }
        if (exprList.length() > 1) {
            throw new ParseException("Only one parameter allowed for #sql directive", location);
        }
        Expr expr = exprList.getExpr(0);
        if (expr instanceof Const && ((Const) expr).isStr()) {
        } else {
            throw new ParseException("The parameter of #sql directive must be String", location);
        }

        this.id = ((Const) expr).getStr();
    }

    @SuppressWarnings("unchecked")
    public void exec(Env env, Scope scope, Writer writer) {
        String nameSpace = (String) scope.get(NameSpaceDirective.NAME_SPACE_KEY);
        String key = StrKit.isBlank(nameSpace) ? id : nameSpace + "." + id;
        Map<String, Template> sqlTemplateMap = (Map<String, Template>) scope.get(SqlKit.SQL_TEMPLATE_MAP_KEY);
        if (sqlTemplateMap.containsKey(key)) {
            throw new ParseException("Sql already exists with key : " + key, location);
        }

        sqlTemplateMap.put(key, new Template(env, stat));
    }

    public boolean hasEnd() {
        return true;
    }
}
